index.php

<?php
/**
 * Copyright 2016 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

# [START logging]
require_once __DIR__ . '/vendor/autoload.php';

use Fluent\Logger\FluentLogger;

$GLOBALS['logger'] = new FluentLogger('localhost', '24224');

function fluentd_exception_handler(Exception $e)
{
    global $logger;

    $msg = [
        'message' => $e->getMessage(),
        'serviceContext' => ['service' => 'myapp'],
        // ... add more metadata
    ];
    $logger->post('myapp.errors', $msg);
}

set_exception_handler('fluentd_exception_handler');
# [END logging]